Spiked Ripsaw (Card)
Spiked Ripsaw
In 526 decks
0% of 1814169 decks
Nov 11, 2021
Innistrad: Crimson Vow Set Review — Green
More than just Vampires were invited to the wedding! These new green cards pack a lot of punch.
Top Commanders (1)
Tovolar, Dire Overlord
0.21% of 10274 decks
22 decks
New Cards (5)
Bristly Bill, Spine Sower
33% of 9 decks
+30% synergy
Power Fist
21% of 19 decks
+18% synergy
Case of the Locked Hothouse
21% of 39 decks
+18% synergy
Aftermath Analyst
11% of 44 decks
+9% synergy
Archdruid's Charm
11% of 44 decks
+6% synergy
High Synergy Cards (3)
Troyan, Gutsy Explorer
45% of 11 decks
+45% synergy
Kutzil, Malamet Exemplar
35% of 20 decks
+30% synergy
Malamet War Scribe
29% of 21 decks
+29% synergy
Top Cards (10)
Deconstruction Hammer
35% of 17 decks
+35% synergy
Cultivate
31% of 526 decks
+8% synergy
Swiftfoot Boots
30% of 526 decks
+1% synergy
Rampant Growth
24% of 526 decks
+7% synergy
Family Reunion
24% of 17 decks
+23% synergy
Bant Charm
24% of 17 decks
+23% synergy
Bramble Armor
21% of 526 decks
+21% synergy
Forge Anew
21% of 34 decks
+19% synergy
Beast Within
20% of 526 decks
+1% synergy
Blackblade Reforged
20% of 526 decks
+16% synergy
Creatures (50)
Envoy of Okinec Ahau
18% of 17 decks
+18% synergy
Ironpaw Aspirant
18% of 17 decks
+17% synergy
Akawalli, the Seething Tower
18% of 17 decks
+17% synergy
Crew Captain
17% of 29 decks
+17% synergy
Child of the Pack
16% of 140 decks
+16% synergy
Llanowar Elves
16% of 526 decks
+5% synergy
Old Rutstein
16% of 122 decks
+15% synergy
Kutzil's Flanker
15% of 20 decks
+15% synergy
Ruby, Daring Tracker
15% of 34 decks
+14% synergy
Uurg, Spawn of Turg
15% of 96 decks
+14% synergy
Kessig Naturalist
14% of 143 decks
+14% synergy
Kemba, Kha Enduring
14% of 43 decks
+14% synergy
The Gitrog Monster
14% of 122 decks
+13% synergy
Ziatora's Envoy
14% of 29 decks
+14% synergy
Tatyova, Benthic Druid
13% of 70 decks
+10% synergy
Abzan Falconer
13% of 118 decks
+11% synergy
Mikaeus, the Lunarch
13% of 118 decks
+11% synergy
Harvesttide Infiltrator
13% of 143 decks
+13% synergy
Rampaging Baloths
12% of 526 decks
+9% synergy
Reclamation Sage
12% of 526 decks
+6% synergy
Eternal Witness
12% of 526 decks
+2% synergy
Hullbreaker Horror
12% of 67 decks
+8% synergy
Fearful Villager
12% of 143 decks
+12% synergy
Fangblade Brigand
12% of 143 decks
+12% synergy
Sram, Senior Edificer
12% of 118 decks
+9% synergy
Leonin Lightbringer
12% of 43 decks
+12% synergy
Gretchen Titchwillow
11% of 70 decks
+11% synergy
Ill-Tempered Loner
11% of 140 decks
+11% synergy
Malamet Brawler
11% of 71 decks
+11% synergy
Village Watch
11% of 143 decks
+11% synergy
Elvish Mystic
11% of 526 decks
+2% synergy
Maja, Bretagard Protector
11% of 118 decks
+10% synergy
Ramunap Excavator
11% of 526 decks
+8% synergy
Springbloom Druid
11% of 526 decks
+8% synergy
Lambholt Raconteur
11% of 141 decks
+11% synergy
Lambholt Harrier
10% of 143 decks
+10% synergy
Goblin Anarchomancer
10% of 143 decks
+7% synergy
Scute Swarm
10% of 526 decks
+6% synergy
The Beamtown Bullies
10% of 29 decks
+10% synergy
Masked Bandits
10% of 29 decks
+10% synergy
Tiana, Ship's Caretaker
10% of 29 decks
+10% synergy
Mr. Orfeo, the Boulder
10% of 29 decks
+10% synergy
Bruenor Battlehammer
10% of 29 decks
+10% synergy
Gryff Rider
10% of 118 decks
+10% synergy
Dawnhart Wardens
10% of 118 decks
+10% synergy
Fleecemane Lion
10% of 118 decks
+10% synergy
Katilda, Dawnhart Prime
10% of 118 decks
+9% synergy
Avacyn's Pilgrim
10% of 118 decks
+7% synergy
Sprouting Goblin
10% of 89 decks
+10% synergy
Braids, Arisen Nightmare
10% of 99 decks
+6% synergy
Instants (50)
Growth Spiral
20% of 70 decks
+15% synergy
Return to Nature
19% of 526 decks
+16% synergy
Putrefy
18% of 122 decks
+14% synergy
Swords to Plowshares
18% of 118 decks
-11% synergy
Tear Asunder
18% of 96 decks
+16% synergy
Riveteers Charm
17% of 29 decks
+17% synergy
Negate
17% of 70 decks
+6% synergy
Harrow
17% of 526 decks
+12% synergy
Abrade
16% of 143 decks
+11% synergy
Entish Restoration
15% of 155 decks
+11% synergy
Roiling Regrowth
15% of 526 decks
+13% synergy
Counterspell
14% of 70 decks
-7% synergy
Tamiyo's Safekeeping
14% of 479 decks
+10% synergy
Adamant Will
14% of 118 decks
+13% synergy
Path to Exile
14% of 118 decks
-6% synergy
Thirst for Discovery
13% of 70 decks
+12% synergy
Broken Wings
12% of 526 decks
+12% synergy
Massive Might
12% of 526 decks
+12% synergy
Crushing Canopy
12% of 526 decks
+12% synergy
Gaea's Gift
12% of 308 decks
+10% synergy
Sure Strike
12% of 143 decks
+12% synergy
Valorous Stance
12% of 118 decks
+11% synergy
Mortality Spear
11% of 122 decks
+11% synergy
Dark Ritual
11% of 122 decks
+1% synergy
Raze the Effigy
11% of 143 decks
+11% synergy
Snakeskin Veil
11% of 526 decks
+9% synergy
Cosmic Rebirth
11% of 37 decks
+10% synergy
Witch's Web
11% of 505 decks
+11% synergy
Chaos Warp
10% of 143 decks
-5% synergy
Return of the Wildspeaker
10% of 526 decks
+4% synergy
Unbreakable Formation
10% of 118 decks
+7% synergy
Crop Rotation
10% of 526 decks
+5% synergy
Staggering Size
10% of 71 decks
+10% synergy
Go for the Throat
10% of 122 decks
+6% synergy
Joint Exploration
10% of 42 decks
+9% synergy
Bedevil
9% of 32 decks
+6% synergy
Heroic Intervention
9% of 526 decks
-4% synergy
Tend the Pests
9% of 122 decks
+9% synergy
Assassin's Trophy
9% of 122 decks
+3% synergy
An Offer You Can't Refuse
9% of 56 decks
-1% synergy
Serpentine Ambush
9% of 68 decks
+9% synergy
Naturalize
9% of 526 decks
+8% synergy
Tyvar's Stand
9% of 243 decks
+6% synergy
Eureka Moment
9% of 70 decks
+8% synergy
Brainstorm
9% of 70 decks
-3% synergy
Burn the Accursed
8% of 143 decks
+8% synergy
Moonrager's Slash
8% of 143 decks
+8% synergy
Plummet
8% of 526 decks
+8% synergy
Resistance Reunited
8% of 48 decks
+8% synergy
Grisly Salvage
8% of 122 decks
+7% synergy
Sorceries (50)
Eerie Ultimatum
21% of 14 decks
+20% synergy
Kodama's Reach
20% of 526 decks
+4% synergy
Nature's Lore
16% of 526 decks
+1% synergy
Splendid Reclamation
14% of 526 decks
+12% synergy
Sanctify
14% of 118 decks
+13% synergy
Urborg Repossession
13% of 99 decks
+13% synergy
Explore
13% of 526 decks
+9% synergy
Open the Armory
13% of 118 decks
+10% synergy
Over the Edge
13% of 71 decks
+12% synergy
Harmonize
13% of 526 decks
+8% synergy
Retrieve
12% of 526 decks
+12% synergy
Urban Evolution
11% of 70 decks
+10% synergy
Unnatural Moonrise
11% of 143 decks
+11% synergy
Dig Up
11% of 122 decks
+10% synergy
Compulsive Research
10% of 70 decks
+10% synergy
Into the Night
10% of 143 decks
+10% synergy
Decimate
10% of 143 decks
+8% synergy
End the Festivities
9% of 138 decks
+8% synergy
Now for Wrath, Now for Ruin!
9% of 33 decks
+9% synergy
Worm Harvest
9% of 122 decks
+9% synergy
Mulch
9% of 526 decks
+8% synergy
Cartographer's Survey
9% of 507 decks
+9% synergy
Arm the Cathars
8% of 118 decks
+8% synergy
Pack's Betrayal
8% of 143 decks
+8% synergy
Dire-Strain Rampage
8% of 143 decks
+8% synergy
Blasphemous Act
8% of 143 decks
-8% synergy
Rishkar's Expertise
8% of 526 decks
+3% synergy
Hard-Hitting Question
8% of 36 decks
+8% synergy
Culling Ritual
8% of 122 decks
+6% synergy
Green Sun's Twilight
8% of 227 decks
+7% synergy
Farewell
8% of 103 decks
+1% synergy
Rabid Bite
8% of 526 decks
+7% synergy
Demonic Tutor
7% of 122 decks
-5% synergy
Three Visits
7% of 526 decks
-4% synergy
Winterthorn Blessing
7% of 70 decks
+7% synergy
Aether Helix
7% of 70 decks
+7% synergy
Serum Visions
7% of 70 decks
+5% synergy
Dryad's Revival
7% of 526 decks
+7% synergy
Scale the Heights
7% of 526 decks
+7% synergy
Bala Ged Recovery
7% of 526 decks
+2% synergy
Many Partings
7% of 144 decks
+6% synergy
Shamanic Revelation
7% of 526 decks
+2% synergy
Vanquish the Horde
7% of 118 decks
+4% synergy
Hazardous Blast
7% of 60 decks
+6% synergy
Skyshroud Claim
7% of 526 decks
+2% synergy
Deadly Brew
7% of 122 decks
+6% synergy
Diabolic Tutor
7% of 122 decks
+3% synergy
Diabolic Intent
7% of 122 decks
+2% synergy
Reanimate
7% of 122 decks
-1% synergy
Feed the Swarm
7% of 122 decks
-3% synergy
Utility Artifacts (50)
Behemoth Sledge
19% of 118 decks
+19% synergy
Malamet Scythe
17% of 71 decks
+17% synergy
Conduit of Worlds
13% of 257 decks
+10% synergy
Plate Armor
13% of 118 decks
+12% synergy
Mage Slayer
13% of 143 decks
+12% synergy
Zuran Orb
12% of 526 decks
+11% synergy
Staff of Titania
12% of 296 decks
+11% synergy
Greatsword of Tyr
11% of 88 decks
+11% synergy
Saddle of the Cavalier
11% of 416 decks
+11% synergy
Hedgewitch's Mask
11% of 118 decks
+11% synergy
Two-Handed Axe
10% of 105 decks
+9% synergy
Bladed Battle-Fan
10% of 50 decks
+10% synergy
Haunted Cloak
10% of 526 decks
+9% synergy
Hexgold Hoverwings
9% of 44 decks
+9% synergy
Loxodon Warhammer
9% of 526 decks
+7% synergy
Holy Avenger
8% of 118 decks
+8% synergy
Lightning Greaves
8% of 526 decks
-17% synergy
Galadhrim Bow
8% of 144 decks
+8% synergy
Vorpal Sword
8% of 122 decks
+7% synergy
Glowcap Lantern
8% of 87 decks
+8% synergy
Fireshrieker
8% of 526 decks
+6% synergy
Cloak of the Bat
8% of 411 decks
+7% synergy
Scavenged Blade
8% of 143 decks
+8% synergy
Goggles of Night
8% of 52 decks
+8% synergy
Beamtown Beatstick
8% of 52 decks
+7% synergy
Hero's Heirloom
8% of 366 decks
+7% synergy
Maul of the Skyclaves
8% of 118 decks
+7% synergy
Pact Weapon
8% of 106 decks
+7% synergy
Kor Halberd
8% of 40 decks
+7% synergy
Gimli's Axe
8% of 40 decks
+7% synergy
Belt of Giant Strength
7% of 526 decks
+7% synergy
Hunter's Blowgun
7% of 71 decks
+6% synergy
Ranger's Longbow
7% of 526 decks
+7% synergy
Tarrian's Soulcleaver
7% of 87 decks
+4% synergy
Sword of Vengeance
7% of 526 decks
+6% synergy
Basilisk Collar
7% of 526 decks
+3% synergy
Mask of Griselbrand
7% of 122 decks
+6% synergy
Thran Power Suit
6% of 308 decks
+5% synergy
Hero's Blade
6% of 526 decks
+6% synergy
Bone Sabres
6% of 316 decks
+6% synergy
Tormentor's Helm
6% of 143 decks
+6% synergy
Kemba's Banner
6% of 48 decks
+6% synergy
Brass Knuckles
6% of 457 decks
+6% synergy
Skyclave Pick-Axe
6% of 526 decks
+6% synergy
Jade Seedstones
6% of 83 decks
+6% synergy
Robe of Stars
6% of 118 decks
+5% synergy
Jackhammer
6% of 120 decks
+6% synergy
Robe of the Archmagi
6% of 52 decks
+5% synergy
Winged Boots
6% of 70 decks
+5% synergy
Scepter of Celebration
6% of 457 decks
+5% synergy
Enchantments (50)
Nature's Embrace
18% of 505 decks
+18% synergy
Might of the Ancestors
18% of 17 decks
+18% synergy
Combat Research
17% of 42 decks
+16% synergy
Petrify
15% of 20 decks
+14% synergy
Blanchwood Armor
14% of 526 decks
+14% synergy
Druid Class
14% of 526 decks
+13% synergy
Sigarda's Summons
14% of 118 decks
+13% synergy
Felidar Retreat
14% of 118 decks
+10% synergy
Invigorating Hot Spring
13% of 129 decks
+13% synergy
Boseiju Reaches Skyward
12% of 486 decks
+12% synergy
Sheltering Boughs
12% of 505 decks
+12% synergy
Rancor
12% of 526 decks
+9% synergy
Moldervine Reclamation
11% of 122 decks
+9% synergy
Garruk's Uprising
11% of 526 decks
+5% synergy
Witness Protection
11% of 56 decks
+10% synergy
Fighter Class
10% of 29 decks
+9% synergy
Cradle of Safety
10% of 68 decks
+10% synergy
Mightstone's Animation
10% of 30 decks
+10% synergy
Primal Empathy
10% of 70 decks
+10% synergy
Undergrowth Recon
10% of 40 decks
+9% synergy
Rhythm of the Wild
10% of 143 decks
+5% synergy
Unnatural Growth
10% of 526 decks
+7% synergy
Up the Beanstalk
9% of 117 decks
+7% synergy
Citadel Siege
9% of 118 decks
+9% synergy
Bestial Bloodline
9% of 109 decks
+9% synergy
Roaring Earth
9% of 480 decks
+9% synergy
Dormant Grove
9% of 526 decks
+9% synergy
Immolation
9% of 143 decks
+9% synergy
Airtight Alibi
9% of 33 decks
+9% synergy
Kaya's Ghostform
9% of 122 decks
+7% synergy
Security Bypass
9% of 56 decks
+9% synergy
Flowering of the White Tree
9% of 34 decks
+6% synergy
Glorious Sunrise
9% of 526 decks
+8% synergy
Eel Umbra
9% of 70 decks
+8% synergy
Imprisoned in the Moon
9% of 70 decks
+7% synergy
Mantle of the Ancients
8% of 118 decks
+7% synergy
Colossal Majesty
8% of 526 decks
+7% synergy
Scion of Halaster
8% of 108 decks
+8% synergy
Audacity
8% of 308 decks
+8% synergy
Tribute to the World Tree
8% of 200 decks
+3% synergy
Retreat to Kazandu
8% of 526 decks
+7% synergy
Wild Growth
8% of 526 decks
+3% synergy
Tamiyo's Compleation
8% of 65 decks
+8% synergy
Angelic Gift
8% of 118 decks
+7% synergy
Colossification
8% of 526 decks
+7% synergy
Rune of Might
7% of 526 decks
+7% synergy
Psychic Impetus
7% of 70 decks
+7% synergy
Frogify
7% of 70 decks
+7% synergy
Wizard Class
7% of 70 decks
+5% synergy
Bear Umbra
7% of 526 decks
+5% synergy
Battles (3)
Invasion of Lorwyn
8% of 50 decks
+8% synergy
Invasion of Fiora
6% of 50 decks
+5% synergy
Invasion of Ikoria
6% of 191 decks
+3% synergy
Planeswalkers (8)
Arlinn, the Pack's Hope
10% of 143 decks
+10% synergy
Nissa of Shadowed Boughs
8% of 122 decks
+8% synergy
Nissa, Who Shakes the World
8% of 526 decks
+6% synergy
Nissa, Ascended Animist
8% of 251 decks
+7% synergy
Ajani, the Greathearted
8% of 118 decks
+7% synergy
Wrenn and Seven
6% of 526 decks
+5% synergy
Minsc & Boo, Timeless Heroes
6% of 104 decks
+5% synergy
Vraska, Golgari Queen
6% of 122 decks
+5% synergy
Utility Lands (43)
Restless Prairie
19% of 21 decks
+18% synergy
Rogue's Passage
18% of 526 decks
-0% synergy
Hidden Volcano
18% of 28 decks
+17% synergy
Hidden Necropolis
15% of 20 decks
+14% synergy
Restless Ridgeline
15% of 27 decks
+14% synergy
Hidden Nursery
14% of 95 decks
+12% synergy
Argoth, Sanctum of Nature
12% of 289 decks
+11% synergy
Raging Ravine
11% of 143 decks
+11% synergy
Kessig Wolf Run
11% of 143 decks
+8% synergy
Reliquary Tower
11% of 526 decks
-17% synergy
The Hunter Maze
11% of 241 decks
+10% synergy
The Dross Pits
11% of 65 decks
+10% synergy
Axgard Armory
10% of 29 decks
+10% synergy
Restless Cottage
10% of 29 decks
+9% synergy
Memorial to Genius
10% of 70 decks
+10% synergy
Halimar Depths
10% of 70 decks
+8% synergy
Bojuka Bog
9% of 122 decks
-7% synergy
Barren Moor
8% of 122 decks
+6% synergy
Mosswort Bridge
8% of 526 decks
+3% synergy
Tranquil Thicket
8% of 526 decks
+6% synergy
Temple of the False God
7% of 526 decks
-3% synergy
Desert of the Glorified
7% of 122 decks
+7% synergy
Memorial to Folly
7% of 122 decks
+7% synergy
Mortuary Mire
7% of 122 decks
+5% synergy
Coral Atoll
7% of 70 decks
+7% synergy
Desert of the Mindful
7% of 70 decks
+7% synergy
Lumbering Falls
7% of 70 decks
+7% synergy
Lonely Sandbar
7% of 70 decks
+5% synergy
Field of Ruin
7% of 526 decks
+4% synergy
The Fair Basilica
7% of 45 decks
+6% synergy
Lotus Field
7% of 526 decks
+5% synergy
Boseiju, Who Endures
7% of 486 decks
-3% synergy
Witch's Cottage
7% of 122 decks
+5% synergy
Yavimaya, Cradle of Growth
6% of 526 decks
-3% synergy
Ghost Quarter
6% of 526 decks
+3% synergy
Grim Backwoods
6% of 122 decks
+5% synergy
Dakmor Salvage
6% of 122 decks
+5% synergy
Cryptic Caves
6% of 526 decks
+5% synergy
Skarrg, the Rage Pits
6% of 143 decks
+5% synergy
Desert of the Indomitable
6% of 526 decks
+5% synergy
Oran-Rief, the Vastwood
6% of 526 decks
+3% synergy
Slippery Karst
5% of 526 decks
+5% synergy
Vitu-Ghazi, the City-Tree
5% of 118 decks
+5% synergy
Mana Artifacts (21)
Sol Ring
49% of 526 decks
-35% synergy
Arcane Signet
34% of 526 decks
-36% synergy
Abzan Banner
21% of 14 decks
+21% synergy
Golgari Signet
15% of 122 decks
+12% synergy
Commander's Sphere
14% of 526 decks
-2% synergy
Gruul Signet
13% of 143 decks
+10% synergy
Moss Diamond
11% of 526 decks
+10% synergy
Talisman of Unity
10% of 118 decks
+9% synergy
Marble Diamond
10% of 118 decks
+8% synergy
Simic Locket
7% of 70 decks
+7% synergy
Simic Signet
7% of 70 decks
+4% synergy
Golgari Locket
7% of 122 decks
+6% synergy
Talisman of Resilience
7% of 122 decks
+4% synergy
Fire Diamond
6% of 143 decks
+3% synergy
Mind Stone
6% of 526 decks
-12% synergy
Decanter of Endless Water
6% of 411 decks
+1% synergy
Selesnya Locket
6% of 118 decks
+6% synergy
Selesnya Signet
6% of 118 decks
+4% synergy
Lapis Orb of Dragonkind
6% of 51 decks
+5% synergy
Golgari Cluestone
6% of 122 decks
+6% synergy
Charcoal Diamond
6% of 122 decks
+3% synergy
Lands (50)
Dismal Backwater
50% of 16 decks
+48% synergy
Port Town
47% of 17 decks
+44% synergy
Swiftwater Cliffs
44% of 16 decks
+42% synergy
Evolving Wilds
40% of 526 decks
+18% synergy
Command Tower
35% of 526 decks
-38% synergy
Prairie Stream
35% of 17 decks
+28% synergy
Thornwood Falls
34% of 70 decks
+33% synergy
Molten Tributary
33% of 9 decks
+32% synergy
Blossoming Sands
32% of 118 decks
+31% synergy
Canopy Vista
31% of 118 decks
+24% synergy
Haunted Mire
29% of 95 decks
+28% synergy
Skycloud Expanse
29% of 17 decks
+27% synergy
Rugged Highlands
29% of 143 decks
+28% synergy
Jungle Hollow
29% of 122 decks
+27% synergy
Jungle Shrine
28% of 29 decks
+24% synergy
Cinder Glade
27% of 143 decks
+18% synergy
Selesnya Sanctuary
26% of 118 decks
+23% synergy
Sungrass Prairie
26% of 118 decks
+24% synergy
Golgari Rot Farm
26% of 122 decks
+22% synergy
Fortified Village
25% of 118 decks
+22% synergy
Wind-Scarred Crag
24% of 29 decks
+23% synergy
Wooded Ridgeline
24% of 88 decks
+22% synergy
Tangled Islet
24% of 42 decks
+22% synergy
Seaside Citadel
24% of 17 decks
+21% synergy
Azorius Chancery
24% of 17 decks
+20% synergy
Racers' Ring
23% of 120 decks
+23% synergy
Gruul Turf
23% of 143 decks
+19% synergy
Temple of Plenty
23% of 118 decks
+20% synergy
Simic Growth Chamber
23% of 70 decks
+18% synergy
Terramorphic Expanse
22% of 526 decks
+6% synergy
Forsaken Sanctuary
21% of 14 decks
+21% synergy
Simic Guildgate
21% of 70 decks
+20% synergy
Sandsteppe Citadel
21% of 14 decks
+19% synergy
Myriad Landscape
21% of 526 decks
-0% synergy
Spectator Seating
21% of 29 decks
+15% synergy
Jetmir's Garden
19% of 26 decks
+15% synergy
Botanical Plaza
19% of 99 decks
+19% synergy
Radiant Grove
19% of 69 decks
+17% synergy
Opulent Palace
19% of 16 decks
+16% synergy
Frontier Bivouac
19% of 16 decks
+16% synergy
Tranquil Cove
18% of 17 decks
+16% synergy
Rockfall Vale
17% of 143 decks
+13% synergy
Boros Garrison
17% of 29 decks
+14% synergy
Sundown Pass
17% of 29 decks
+14% synergy
Ziatora's Proving Ground
17% of 29 decks
+14% synergy
Tainted Wood
17% of 122 decks
+15% synergy
Sacred Peaks
17% of 18 decks
+15% synergy
Blighted Woodland
17% of 526 decks
+13% synergy
Bloodfell Caves
16% of 32 decks
+14% synergy
Gruul Guildgate
15% of 143 decks
+14% synergy